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Man-made earthquakes? Tornadoes caused by U.S. cities? Volcanoes activated by humans? We examine how efforts to harness natural resources can trigger natural disasters. Watch how a Chinese dam weighing as much as 3,000 Empire State Buildings caused tremors that claimed the lives of 90,000 people. Witness how another dam could trigger mudslides that bury millions. Investigate how growing urban areas can cause tornadoes and how mining and drilling have activated deadly mud volcanoes.